上行车

I had to strap the bag to my bicycle.

我得用带子把包捆到自行车。

He has a bicycle with lights powered by a dynamo.

他自行车灯由发电机提供能源。

He was covered with bruises after falling off his bicycle.

他从自行车摔了下来, 摔得浑身伤痕。

This motorcyclist who is motorial is cycling in the motordrome.

这个有运动神托车手赛车道路自行车。

Evolving process of hub dynamo which used in bicycle is presented. The performance of magnetite viz. ferrimagnetism or NdFeB is analyzed. The prospect of marketing is viewed.

摘要介绍了自行车使用花鼓式发电机演变过程，分析了所用磁石，即铁氧体或钕铁硼性能优劣，并进行了市场前景展望。